Drilling-machine



(No Model.) 2 Sheets-Sheet 1. F. H. RICHARDS.

DRILLING MACHINE.

No. 460,692. Patented Oct. 6, 1891.

(No Model.) 2 sheets-wsheet 2.

P. H. moi-Inns. DRILLING MACHINE.

Mmewes:

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THE nonms PETERS 0a., mowumm, WASHINGTON, ac.

UNITED STATES PATENT OFFICE.

FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO ECKLEY B. COXE, OF DRIFTON, PENNSYLVANIA.

-DRII..LING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 460,692, dated October 6, 1891.

Application filed June 2'7. 1891- Serial No. 397,694- (No model.)

To aZZ whom it may concern:

Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

This invention relates to drilling-machines for drilling metals, and more especially to To that class thereof which are known as multiple dfilling-machines, and it is in part in the nature of an improvement on the machine described in Letters Patent of the United States No. 421,517, granted me February 18,

In the drawings accompanying and forming a part of this specification, Figure 1 is a plan view, partially in section, of a drillingmachine embodying my present improvements. Fig. 2 is a right-hand side elevation of the machine. Fig. 3 is a central vertical section of the same. Fig. 4 is a front elevation of the machine, partially in section. Fig. 5 is a plan view of the counterbalanee-weight.

2 5 Fig. 6 is a sectional view of the spindle-driving sleeve in line a aof Fig. 3. Fig. 7 is a detail view of the lower end of the spindle.

Similar characters designate like parts in all the figures.

0 The column B, which constitutes the framework of the machine, is composed of the base 2, the webs 3 3 rising from said base and joining the front wall at and the gear-casings formed integral therewith. The outer ends 3 5 of said casing are enlarged to receive the gearing, as hereinafter set forth.

The driving-shaft E, on which is fixed the driving-pulley D, has afront bearing consisting of the bushing 7, fitted into and secured to the enlarged upper portion 9 of the column B, a rear bearing 10, that is suported by the sleeve 5, which is secured to the frame-work, and a bearing 8 intermediate to said bearings 7 and 10 and carried by said sleeve 5. 5 On the forward end of said shaft E the driving-pinion 11 is fixed in any well-known manner. Said gear orpinion 11 is contained in the wheel-pocket 14., that is formed in the upper and forward part of the frame-work, which pocket may be kept supplied with oil for the lubrication of the said gear 11 and the large bevel-gear 15 with which it meshes. The gear 15 is contained in the enlarged upper portion 12 of the casing 6, which casing is furnished with a cap or cover 16, secured thereto by holding-screws 16, as shown in Fig. Said gear 15 is fitted on and may be secured to the sleeve 17 in any well-known manner, said sleeve being bored to receive the upper end of the unsplined crank-spindle F. The sleeve 17 is fitted to turn in the bushings 18 and 19 in the casing 6 and the cap 16, respectively, which bushings form the upper and lower bearings therefor. The spindle F has a flange 21 formed on the .lower end thereof, and has its lower bearing in the movable head H, immediately above said flange. The upper end of the sleeve 17 is slotted, as at 22 22, and is furnished with asorew cap, as 17, at the upper end thereof. The said slots are formed to receive the rollers 20 20, which are jonrnaled on the pin 23 that is fixed in the upper end of the spindle F. Said rollers and slots act somewhat after themanner of a key and keyway to rotate the spindle on the turning of the sleeve 17, but with less friction. Should the spindle and sleeve be keyed or splined together in the ordinary manner with a sliding key there would obviously be consider able friction of the parts, tending to resist the vertical movement of the spindle. By means of the above-described construction thatresist ance is in a geeat measure overcome. A packing 24: and gland 25 are provided to prevent oil from the parts above running down onthe spindle. The spindle F being unsplined, as set forth, and only connected with its actuating meansabove its driving-gear 15, said spindle is adapted to revolve and slide through the packing without wearing the same.

As hereinbefore set forth, the lower end of the spindle F is journaled at 26 in the movable head I'I. Immediately above the said bearing there is secured to said spindle a counter-weight 27 by means of a ring-nut 28 and a check-nut 29. Said counter-weight 27 is shown in detail in plan view in Fig. 5. It consists of a disk having a rim or flange 30, formed on the periphery thereof,- and a central hub 31, bored to receive the spindle F. Ice The space between the said hub and flange is, for a portion of the circumference, filled with the weight portion 32, as shown in said Fig. 5. Said weight is provided for the purpose of counterbalancing the gyratory plate or bar carried on said spindle below the head H. The movable head II is supported and guided in its ver ical movement by the edges or ways 4' and 4 of the wall 4, which ways are fitted to form a bearing therefor. As shown in Fig. 2, said head is removably attached to the said web 4 by means of the usual straps 92, which are held by bolts in a well-known manner.

For moving the head 11 up and down on the columnB, together with the spindle F and the parts carried thereby, I have provided a feed mechanism, which may be described as follows: A feed-shaft O is carried in the bear ings 33 and 34, which are fixed to the column B, and the worm-wheel 35 is centrallylocated on said shaft (3, within the casing of the column, and is fixed thereto by akey or otherwise. The wheel 35 meshes with and is driven by a worm 36, which is carried fixed to the driving-shaft E,between the bearings 7 and 8 of said shaft. To one end of the feed-shaft 0 there is fixed a gear 37, and to the opposite end of said shaft is fixed another and similar gear 38. The gear 37 meshes with and drives an intermediate wheel 39, which is carried on a stud 40, that is adjustably fixed to an arm 41, pivotally supported on the column B. Said stud 40 also carries a small gear or pinion 42, which is formed on or fixed to the gear 39 and turns therewith. A clutclrshaft G is journaled in the bearings 42 and 43, which are fixed in the aforesaid casing 6, as shown in Fig. 1. The shaft G carries fixed thereto, (by keys or otherwise) adjacent to said bearings 42 and 43, the friction-disks 44 and 45, said disks being adj ustably fixed laterally on said shaft by means of suitable nuts, as 46, in a well-known manner. A pair of frictionwheels 47 and 48 are carried on the shaft G, outside of the disks 44 and 45, and are fitted to freely turn on said shaft, being heldlaterally thereon by means of other suitable nuts, as 49. The inner faces of the rims of said friction-wheels are fitted to frictionally engage the periphery of the aforesaid friction-disks.

The clutch-shaft G is hollow and has therein the sliding rod 50, to either end of which is fitted a pair of cams or wedges 51 and 52, and is furnished with suitable adj listing-nuts, as 53, to regulate the positions of said parts. As illustrated in Figs. 1 and 4 of the drawings, ears are formed on the friction-wheels 47 and 48, to which are pivoted the dogs or levers 54 and 55, which levers engage the aforesaid wedges 51 and 52 for throwing into frictional engagement the friction-disks 44 and and the friction-wheels 47 and 48, respectively, in a well-known manner.

An arm 56 is fixed to the frame-work, and to the upper end of said arm is pivotally at tached one end of the link 57, whose opposite end is pivotall y connected with the upper end of the clutch-lever or shipper 58. Said shipper 58 is connected by a forked end to the grooved cam 01' wedge 51 in awell-known manner, so that by throwing said lever to the right or to the left in Fig. 4, one or the other of the friction-wheels 47 and 48 may be thrown into frictional engagement with its frictiondisk, as may be required. The teeth of the friction-wheels 47 and 48 mesh with the teeth of the gears 42 and 38, respectively, and these wheels being always in mesh, and said wheels 47 and 48 being fitted to freely turn on the shaft G, said wheels are always revolving when the driving-shaft E is rotating. Should the operator throw the lever 58 toward the left hand in Fig. 4, the wheel 47 would be thrown into engagement with the disk 44, and the shaft G would be rotated to slowly lower the head H to feed the drills to the work, and if said lever 58 be thrown in the opposite direction, toward the right hand in Fig. 4, the wheel 48 would be thrown into engagement with the disk 45, and the shaft G would be rotated in the opposite direction to quickly raise the head H, the drill-spindle F, and the drills.

For the purpose of connecting the clutchshaft to operate the head 11 a pair of worms, as 60, are fixed on the clutch-shaft within the gear-casing and mesh with a pair of internally-threaded worm-wheels or revolvi n g nuts, as 61 (51, which are carried within the hollow outer ends of the casing 6, as illustrated in Figs. 1 and 4. Said worm-wheels 61 61 are held in place from below by means of the caps or covers 62 and 63, which are secured to the'casing 6 by screws or bolts, as shown, said wheels being bored and threaded to receive the non-revol vin g feed-screws or screw-shafts (34 and 65. The casing 6 is bored immediately above said worm-wheels, to allow of the free passage of the feed-screws and to form upper guide-bearings therefor. The outer ends 66 and (57 of the head H are fitted to receive the feed-screws 64 and 65, respectively, which screws are secured therein by means of the collars 68 and 69, formed on said screws, re spectively, and the nuts 70 and 71. Below said collars 68 and 69are formed similar collars or flanges 72 and 7 The feed-screw ends below said collars 72 and 73 are reduced in size to receive the drill-carrying bar 7 4, which is bored near the ends thereof to fit on said reduced ends, and is held in place by the nuts 75 and 76.

In the drawings I have shown a series or gang offour drills 77, carried by the spindles journaled in the sockets 78, which sockets are removably fixed in the bar 74. The drill-spindles are provided at their upper ends with crank-arms, as 79, whose crank-pins work in holes formed in the gyratory driving-plate 80. Said driving-plate or bar is driven by means of a crank-pin 81, that is formed on the flange 21 of the spindle F, the radius of said pin corresponding to the radius of the drill-cranks. The preferred construction of the drills, their spindles and cranks, and the driving-bar is fully illustrated and described in Letters Patent of the United States, No. 404,364, granted to me May 28, 1889, to which reference is hereby made.

The drilling-machine is furnished with a suitable form of work holder or table for holding the work to be drilled. Said work-holder, when of the construction shown in the drawings, consists of the table T, fitted to the web 4 of the column B, after the manner ofthe movable head H, and removably-secured thereto by means of the straps 93 and bolts 94. As a means for raising and lowering the said table, a worm-rack 82 is fixed in place on the face of the column, substantially as shown in Figs. 3 and 4 of the drawings. A shaft or stud 83 is fixed in the table '1, near the inner side thereof, and carries journaled thereon a worm 84, whose teeth mesh with the teeth of the rack 82. A bevel-gear 85 is also journaled on the said stud 83, and may be either fixed to or formed integral with the said worm 84, so as to turn with it. A shaft 86 is journaled in bearings formed on the under side of the table, and has fixed to the inner end thereof a bevel-gear 87, similarto the gear 85, and meshing therewith. WVhen it is desired to raise or lower the table T, a wrench or crank may be applied to the squared outer end 88 of the shaft 86, whereby to rotate said shaft to raise or lower the table, as may be required. Blocking-pieces, as 89 and 90, of various lengths, are provided, whereby to block up the table at any desired height, and to take the downward pressure of drills when the machine isin operation. For this purpose the table has the seats 95 and 96 for resting on said blocking-pieces.

For the purpose of facilitating the assembling and disassembling of the driving mechanism, the bearing7 and the sleeve 5, together with the parts mounted therein, are arranged to be removed together from the machine by first taking the wheel D off from the shaft E, and then removing the small screws 91, which hold the sleeve 5 in place by its flange, substantially as shown in Fig. 3. The bearing? is supposed to be kept from rotation by means of an ordinary key (not shown) and has in, the lower side thereof a channel or passage way 13, which, on the withdrawal of the shaft E, (with the gear 11, bearing 7, and worm 36, all assembled thereon,) permits the passage through said bearing of the upper edge of the worm-wheel 35, thus avoiding the removal of this worm-wheel previous to the removal of the shaft E. It will be observed that the hearing 7 is of larger diameter than the gear 11, so that when said bearing is slid out toward the right hand in Fig. 3 the gear passes free of the frame-work. Similarly that portion of the sleeve 5 which fits, asshown,in the frame-work is of larger diameter than any portion of the bearing 7. With this explanation of the construction, and by comparison of the drawings, this feature of the machine will, it is thought,

be readily understood by those acquainted with the construction of drilling machinery in general.

The general operation of my improved drilling-machine is as follows: The table or workholder T should first be adjusted, by means of the mechanism described, to about the height desired, according to the work to be operated upon. Blocking-pieces of the proper height should then be set in place under the table and the table lowered onto said pieces.

The proper sized change-wheels 39 and 42 should next be fitted in the machine to give the required speed to the downfeed, when the machine is ready for use. Power is applied to the machine by means of an ordinary belt applied to the driving-pulley D. The driving-shaft E, being rotated, operates through the pinion 11, the large bevel-gear 15, and the connections described to rotate the drill-spindle F, and through said spindle and the gyratory plate the drills. By'throwing the lever 58 toward the left hand in Fig. 4 the drills are fed down to the work through the feed mechanism described. When the holes have been drilled to the proper depth, the'operator throws the lever 58 toward the right hand, and the drills are rapidly raised through the quickreturn feed mechanism, and the machine is ready for another operation.

Having thus described my invention, I claim- 1. In a drilling-machine, the combination, with a frame-work having ways for the movable head, of the movable head H, fitted to slide on said ways, the screw-shafts fixed in the opposite ends, respectively, of the head If and below said head carrying the jig-plate and the crank-provided drills, the crank-spindle F, journaled in the movable head, and the driving-bar carried on said spindle-crank and engaging the drill-cranks, substantially as described.

2. In a drilling-machine, the combination, with the head H and its feed-shafts 64 65 and with the j ig-plate carried thereby and carrying the crank-provided drills, of the crankspindle F journaled in said head and carrying the driving-bar engaging the cranks of said drills, and the counter-balance carried on said spindle contiguous to-said head and having its weighted portion set oppositely to the spindle-crank, all substantially as shown.

3. In a drilling-machine, the combination, with a frame-work, of the removable head H, fitted to slide thereon and having the screwshafts 64 and 65 fixed therein and carrying the drill-actuating spindle F, the worm-wheels internally threaded to engage said screwshafts, and the shaft and worms connecting said worm-wheels for simultaneous movement to raise and lower the said head, all substantially as described.

4. In a drilling-machine, the combination, with a frame-work and with the movable head I-I, fitted to slide thereon, of the shafts 64 and 65, fixed in said head and engaging the internally-threaded worm-wheels, the drillactuating spindle journaled in the removable head and operatively connected, substantially as described, to be driven from the drivingshaft E, the feed-shaft, worms operatively connecting said worm-wheels for simultaneous movement, and intermediate connecting clutch mechanism, substantially as described, actuating the feed-shaft from said shaft E, all substantially as setforth.

5. In a drilling-machine, the combination, with the spindle F, of the spindle-driving sleeve having the slots 22, and a pin and rollers, substantially as described, carried by said spindle and running in said slots, substantially as described.

(3. In a drilling-machine, the combination, with a suitable frame-work, substantially as described, of the unsplined vertical spindle F, the driving-wheel having the upwardly-extending sleeve, means connecting the upper end of the spindle with said sleeve for sliding movement of the spindle within the sleeve, and the packing around the spindle below the gear, all substantiallyas set forth.

7. In a drilling-machine, the combination, with the frame-work and with a movable head, substantially as described, fitted to slide thereon, of the crank-spindle jeurnaled in said head and extending upward therefrom, the screw-shafts fixed in said head and extending upward therefrom, the Worm-Wheel threaded to engage said screw-shafts, the driving-shaft E, gearing, substantially as described, connecting said spindle to be actuated from said shaft, the hollow feed-shaft G and worms fixed thereon connecting said worm-wheels, a friction-disk carried on each end of the shaft G,intermediate gearing, substantially as described, actuating said friction-wheels from the shaft E and in opposite directions, respectively, and shipping apparatus, substantially as described, constructed to alternately engage and disengage said friction-wheels, substantially as set fort-11.

8. In a drillingmachine, the combination, with a frame-Work, substantially as described, having the Wheel-pocket 14, of the drivinggear 11, the shaft E, carrying said gear, the re movable bearing 7, fixed in the frame-Work and supporting said shaft adjacent to said gear and of larger diameter than said gear, the sleeve 5, having bearings supporting the other end of said shaft, the portion of said sleeve fitting in the frame being larger than said bearing 7, the shaft 0, located crosswise of the shaft E, the Worm 30, fixed on the shaft E intermediate of its said bearings, and the Worm-Wheel S5, fixed on the shaft C and engaging said worm, said bearing 7 having the slot 13, forming a passage-way for draining the wheel-pocket 14 and for the passage of the upper edge of said Worm-wheel when the shaft E, with its bearings and gears thereon, is removed from the frame-Work, substantially as set forth.

FRANCIS II. RICHARDS.

Witnesses:

HENRY L. RECKARD, E. G. FOWLER. 

